使用AFNetworking

Question

要登记数据发送到服务器发送嵌套JSON，我使用JSON是以下形式：

这是怎么了发送。

NSURL * url = [[NSURL alloc] initWithString:registerUrlString]; 
      AFHTTPClient * httpClient = [[AFHTTPClient alloc] initWithBaseURL:url]; 
      httpClient.parameterEncoding = AFJSONParameterEncoding; 
      [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES]; 
      NSDictionary * params = @{@"regData": @{ 
               @"City": self.cityField.text, 
               @"Country": self.countryField.text, 
               @"Email_Id": self.emailField.text, 
               @"MobileNumber": self.numberField.text, 
               @"UserName": self.userName.text, 
               } 
             }; 

      NSMutableURLRequest * request = [httpClient requestWithMethod:@"POST" path:registerUrlString parameters:params]; 
      AFHTTPRequestOperation * operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) { 
       NSLog(@"Success: %@", JSON); 

      } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) { 
      NSLog(@"Error: %@", [error debugDescription]); 
      }]; 

      [operation start]; 

但不幸的是我收到此错误：

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x94b3c30 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

Answer 1

您的要求是罚款。错误Error Domain=NSCocoaErrorDomain Code=3840正在返回，因为您的服务器响应无效的JSON对象。 NSLogoperation.responseString查看正在发回的内容。

Answer 2

尝试使用此方法获得实际的错误

NSLog(@"Error: %@", [error debugDescription]); 
NSLog(@"Error: %@", [error localizedDescription]);